Disclosure of Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Foreign currency translation adjustment	$ (28,915)	$ (28,829)	$ (26,658)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	(327,048)	(333,287)	(207,933)
Tax effect	115,504	117,229	79,962
Net of tax amount	(211,544)	(216,058)	(127,971)
Unrealized holding gains on securities available-for-sale	222,864	230,746	164,596
Tax effect	(25,987)	(27,668)	(22,933)
Net of tax amount	196,877	203,078	141,663
Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Pretax	(290)	(1,057)	(51)
Tax effect	87	318	15
Net of tax amount	(203)	(739)	(36)
Accumulated other comprehensive income (loss)	$ 43,785	$ 42,548	$ 13,002